Genotoxicity Effects in Freshwater Fish from a Brazilian Impacted River
| Autor: | Isac Silva de Jesus, Marta Margarete Cestari, Marcos A. Bezerra, Paulo Roberto Antunes de Mello Affonso |
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| Rok vydání: | 2015 |
| Předmět: |
Health
Toxicology and Mutagenesis Biomagnification Rain Population 0211 other engineering and technologies Drainage basin 02 engineering and technology 010501 environmental sciences Toxicology 01 natural sciences Hoplias malabaricus Geophagus Rivers Metals Heavy Animals Humans education Catfishes Micronuclei Chromosome-Defective 0105 earth and related environmental sciences 021110 strategic defence & security studies education.field_of_study geography geography.geographical_feature_category biology Sewage Ecology Fishes General Medicine Cichlids biology.organism_classification Pollution Oreochromis Freshwater fish Omnivore Seasons Brazil Water Pollutants Chemical Environmental Monitoring Mutagens |
| Zdroj: | Bulletin of environmental contamination and toxicology. 96(4) |
| ISSN: | 1432-0800 |
| Popis: | This study evaluated the incidence of nuclear abnormalities (NA) in four fish species from an impacted river in Northeastern Brazil, characterized by accumulation of heavy metals and organic sewage. Two carnivores (Serrasalmus brandtii and Hoplias malabaricus) and two omnivore species (Oreochromis niloticus and Geophagus brasiliensis), used as food sources by local populations, were collected during the dry and the rainy season along Contas River basin. Nuclear abnormalities (bulbs, binuclei, lobes, micronuclei, notches, and vacuoles) were reported in all fish samples, with high occurrence in S. brandtii and H. malabaricus, species commonly found in local fish markets. This result agrees with previous analyses of accumulation of trace metals in both species, suggesting an association of genotoxic effects and biomagnification. Moreover, native specimens collected near urban areas presented higher frequencies of NA while O. niloticus seems to be more tolerant to environmental contamination. Therefore, effective policies are required to reduce the contamination of Contas River, since pollution by xenobiotics are potential threats to both local biodiversity and human population. |
| Databáze: | OpenAIRE |
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